A Conducting Bar of Length L Rotates in a Counterclockwise

Multiple Choice

A conducting bar of length L rotates in a counterclockwise direction with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, VA − VB?

A) +24 mV
B) −24 mV
C) +16 mV
D) −16 mV
E) +32 mV